<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 标题区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs侧边栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabsLeave"
          @tab-click="tabsClicked"
        >
          <!-- 基本信息区域 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_name">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 遍历动态参数 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 渲染多选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="item2" v-for="(item2,i2) in item.attr_vals" :key="i2"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadImgUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
              :headers="headerObj"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览dialog -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt class="previewDialogImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      cateList: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      addForm: {
        goods_name: '',
        goods_price: '',
        goods_weight: '',
        goods_number: '',
        goods_cat: '',
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ]
      },
      manyTableData: [],
      onlyTableData: [],
      uploadImgUrl: 'https://www.liulongbin.top:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      // fasle
      if (res.meta.status !== 200) {
        return this.$message({
          type: 'warning',
          message: res.meta.data,
          duration: 800
        })
      }
      // suc
      this.cateList = res.data
    },
    beforeTabsLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message({
          type: 'error',
          message: '请先选择商品分类!',
          duration: 800
        })
        return false
      }
    },
    async tabsClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        // fasle
        if (res.meta.status !== 200) {
          return this.$message({
            type: 'warning',
            message: res.meta.data,
            duration: 800
          })
        }
        // suc
        // 遍历data 让 attr_vals 属性变成数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        // console.log(res.data)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        // fasle
        if (res.meta.status !== 200) {
          return this.$message({
            type: 'warning',
            message: res.meta.data,
            duration: 800
          })
        }
        // suc
        this.onlyTableData = res.data
      }
    },
    // 上传图片组件图片预览事件
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 上传图片组件图片被移除事件
    handleRemove(file) {
      const i = this.addForm.pics.findIndex(x => {
        if (x.pic === file.response.data.tmp_path) {
          return true
        }
      })
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm);
    },
    // 上传图片组件图片上传成功事件
    handleSuccess(res) {
      if (res.meta.status !== 200) {
        this.$message({
          message: res.meta.data,
          type: 'error',
          duration: 900
        })
        return false
      }
      const tmpPath = { pic: res.data.tmp_path }
      this.addForm.pics.push(tmpPath)
      // console.log(this.addForm);
    },
    // 添加商品的事件
    add() {
      // 验证表单
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 深度克隆数组
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        // console.log(this.addForm);
        // console.log(res);

        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }

        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
}
/deep/ .el-step__title {
  font-size: 11px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewDialogImg {
  width: 100%;
}
/deep/ .ql-editor {
  min-height: 300px;
}
.btnAdd {
  margin-top: 10px;
}
</style>
